A theory of justice...
Rawls’ most famous work, A Theory of Justice (1971), provides an introduction to this body of thought as well as some of its implications for ethics. Like many philosophers before him, Rawls focused upon justice because of its substantive importance for organizing and governing society.
The problem, however, involves defining what that term means theoretically (i.e., speculatively about organizing and governing society) and practically (i.e., the consequences for people and their lives).
Generally, speaking, justice can be defined in one of two ways. One definition emphasizes an individual’s merit or lack of it. According to this definition, each individual must be treated exactly as one deserves. This "merit theory" of justice, reflecting utilitarian ethics, uses merit to determine just how individual members of society will be rewarded or punished based solely upon whether one 's conduct is useful or harmful to society. The "need theory" of justice, which assumes that individual members of society should help those other members who are most in need so as to redress their disadvantages, reflects the influence of natural law theory and Kant 's categorical imperative. In this view, “doing good” dictates that every member of society recognize that need entitles the most disadvantaged to some sort of special consideration
References: Aristotle. (1958). Nicomachean ethics (W. D. Ross, Trans.) In J. D. Kaplan (Ed.), The pocket Aristotle (pp. 158-274). New York: Washington Square Press. Maclagan, P. (1998). Management & morality. Thousand Oaks, IL: Sage Press. Rawls, J. (2001). Justice as fairness: A restatement. Cambridge, MA: Belknap Press. Rawls, J. (1999a). A theory of justice (rev. ed.). Cambridge, MA: Belknap Press. Rawls, J. (1999b). The law of peoples with “the idea of public reason” revisited. Cambridge, MA: Harvard University Press. Rawls, J. (1996). Political liberalism. New York: Columbia University Press. Rawls, J. (1971). A theory of justice. Cambridge, MA: Harvard University Press. Thompson, D. F. (1990). Political ethics and public office. Cambridge, MA: Harvard University Press.